Here's a tricky one!! 1. The problem statement, all variables and given/known data A soccer player kicks a rock horizontally off a 40.0m high cliff into a pool of water. If the player hears the sound of the splash 3.00s later, what was the initial speed given to the rock? Assume the speed of sound in air to be 343 m/s. I am completely confused on where to even start. It does not seem like enough information is given in the problem but there is an answer for it in the back of the book (I just need to show my work). I am assuming that the sound was heard 3 seconds after he kicked it (not 3 seconds after it hit the water because that would be one hell of a kick even for a soccer player). That given I would need to know the distance the rock was away from the person in order to get the time it took to relay the sound. If I had that i could find the time it took for the rock to hit the water. What am I missing here????